Bathroom Tile Calculator
Estimate tile for bathroom floors, walls, showers and tub surrounds. Enter each surface, openings, tile size, waste, box coverage and costs to calculate pieces, cartons and an installed budget.
Bathroom Tile Quantity and Cost Calculator
Floor, Wall & ShowerBathroom Project Scope
Floor and Main Wall Measurements
Shower and Tub Measurements
Tile, Waste and Box Settings
Measure floors, wall faces, shower planes, niches, curbs and tub returns independently. Use the calculator’s additional-area field for smaller tiled surfaces that do not fit the main rectangles.
Editable Cost Settings
Replace sample prices and rates with current product coverage and local quotations. The calculator rounds the purchase upward to complete boxes.
Planning estimate only. Confirm substrate condition, waterproofing, movement joints, slip requirements, actual tile caliber, grout spacing, cut reuse, trim, setting materials and installer pricing.
What Changes a Bathroom Tile Estimate?
A reliable order depends on the true tiled surfaces, the selected product, the layout and the amount of cutting around bathroom features.
Separate Surface Areas
Calculate the floor, each wall, shower floor, shower walls, tub surround, curb, bench and niche as individual rectangles before combining them.
Doors and Windows
Subtract only confirmed openings that will not receive tile. Small penetrations still require full material around their edges and often create extra cuts.
Tile Size and Pattern
Large-format, diagonal, herringbone and mixed-size layouts change cut reuse, perimeter planning and the amount of practical waste.
Wet-Area Details
Drains, slopes, valves, niches, benches and curbs create more detailed cuts than an open floor or uninterrupted wall.
Box Coverage
Use the printed coverage per carton, not an assumed number of pieces. Purchase quantities must be rounded upward to sealed boxes.
Repair Reserve
Keep matching tiles after installation because shade, finish and caliber may change, and a discontinued bathroom tile can be difficult to replace.
Measure the Bathroom as a Group of Rectangles
Sketch every tiled plane. Divide irregular floors into rectangles, calculate walls from run multiplied by tiled height, and measure shower or tub faces separately before combining areas.
Add all tiled surface areas, subtract confirmed untiled openings, apply the waste percentage, divide by one tile’s face area for a planning piece count, then divide by carton coverage and round upward to complete boxes.
Measure the Floor Before Fixtures Confuse the Plan
Use the full tiled footprint, including beneath a freestanding vanity when tile continues underneath. Do not subtract a toilet footprint. Exclude built-ins only when tile will stop at their edges.
Measure Walls by Tiled Height
Multiply each tiled wall run by its actual tile height. Divide changing-height elevations into rectangles, then add tiled returns and ledges separately.
Measure Shower Surfaces Independently
Calculate the shower floor and each wall separately. Add curb, bench and niche faces because these detailed surfaces consume cuts from full pieces.
Calculate different floor, shower and wall products separately whenever tile size or carton coverage changes.
Move From Measurements to a Complete Tile Order
Use a repeatable process so floor tile, wall tile, shower mosaics and trim are not accidentally mixed into one inaccurate total.
Sketch Every Plane
Label the floor, each wall, shower, tub surround, niches, curbs, benches and permanent exclusions.
Calculate Net Area
Multiply length by width for each section, add the results and subtract only confirmed untiled openings.
Add Product-Specific Waste
Choose an allowance that reflects pattern, room shape, tile size, breakage risk and detailed shower cuts.
Round to Full Cartons
Use exact box coverage, round upward and keep suitable unopened or labeled pieces for future repairs.
Choose Waste by Surface, Pattern and Cutting Difficulty
Waste varies by surface and layout. Straight grids may reuse offcuts, while diagonal floors, niches and large-format panels often create less reusable material.
| Bathroom Area | Typical Layout Issue | Useful Planning Focus | Waste Consideration |
|---|---|---|---|
| Open bathroom floor | Perimeter and doorway cuts | Balanced layout and thresholds | Lower when the room is simple |
| Wall wainscot | Top termination and corner cuts | Level courses and trim alignment | Increase for several openings |
| Shower floor | Drain, slope and small pieces | Sheet alignment and slip suitability | Allow for drain-centered cuts |
| Shower walls | Niches, valves and inside corners | Focal lines and waterproof transitions | Increase with detailed features |
| Tub surround | End walls, plumbing and ledges | Balanced corners and top course | Add for returns and apron tile |
| Herringbone feature | Repeated angled cuts | Centerline and pattern termination | Often higher than a straight grid |
Do Not Combine Different Products Into One Box Count
Floor porcelain, shower mosaics, wall tile and niche accents may have different coverage, price and waste. Estimate each product separately, then combine costs.
Measure Trim Separately
Profiles, bullnose and base tile are ordered by linear length. Record exposed edges, outside corners and transitions independently from square-area tile.
Use Actual Carton Data
Use the printed square-foot or square-meter coverage per carton rather than relying only on theoretical tile face area.
Include More Than the Tile Price
A bathroom budget may include demolition, substrate repair, backer board, waterproofing, drains, mortar, grout, sealant, trim, delivery and labor—not only tile cartons.
Price Decorative Tile Separately
Measure mosaics, borders and niche accents as their own bands or panels because their carton coverage and unit price may differ sharply from field tile.
Account for Preparation and Waterproofing
Large tile requires a suitably flat surface, while shower systems need correctly sloped and waterproofed assemblies. Preparation is not optional simply because the finish tile is attractive. Enter a project allowance only after reviewing the existing substrate and intended system.
Compare Equal Scopes
Give installers the same sketch, tile schedule, pattern and preparation requirements so quoted totals cover comparable work.
Common Bathroom Calculator Mistakes
- Multiplying the room perimeter by full ceiling height when only part of the wall will be tiled.
- Subtracting toilets, drains and small plumbing penetrations too aggressively.
- Forgetting niche sides, curb faces, bench fronts, window returns and tub-apron tile.
- Using one box-coverage figure for several different tile products.
- Applying the same waste allowance to a plain floor and a detailed shower.
- Ordering exact measured area without full-carton rounding or repair stock.
- Ignoring trim length, movement joints, waterproofing and substrate preparation.
Tile cartons + setting materials + preparation + waterproofing + trim and delivery + installation labor + contingency = estimated installed bathroom tile cost.
Bathroom, Shower, Floor and Wall Tile Tools
Use related calculators to separate products, verify measurements, choose waste and create a complete bathroom order.
Frequently Asked Questions About Bathroom Tile
Answers about bathroom measurements, waste, cartons and installation costs.
How do I calculate how much tile I need for a bathroom?
Calculate every tiled floor and wall plane separately, add the areas, subtract confirmed untiled openings, apply waste and divide by carton coverage. Round the final order upward to complete boxes.
Should I include the area under a bathroom vanity?
Include it when tile will continue beneath a freestanding or legged vanity. Exclude a permanent built-in cabinet only when the installation plan confirms tile will stop at its footprint.
Do I subtract the toilet area from bathroom floor tile?
Usually no. Bathroom floor tile commonly extends beneath and around the toilet, and the small opening does not justify reducing the order.
How do I calculate shower wall tile?
Multiply each shower wall width by the tiled height, add the wall areas and include niche, bench, curb and return surfaces separately. Subtract only genuine untiled openings.
How much extra bathroom tile should I buy?
The right allowance depends on pattern, tile size, room shape, breakage and detailed cuts. Simple grids may need less than diagonal, herringbone or feature-heavy shower work.
Can I combine bathroom floor and wall tile in one calculation?
Combine them only when they use the same product, carton coverage and waste assumption. Different tile products should be calculated separately.
Does grout-joint width change the number of tiles?
It changes the installed module and row layout, but purchase quantities should still be based primarily on measured area, actual product coverage, waste and complete cartons.
How do I calculate tile boxes?
Divide the waste-adjusted purchase area by the printed coverage per box and always round upward. The last carton may create more spare coverage than the selected percentage.
Does this calculator estimate bathroom tile installation cost?
Yes. Editable fields include tile cartons, labor, setting materials, preparation, waterproofing, trim, delivery, other costs and contingency.
Can the calculator use square meters?
Yes. Select meters for bathroom dimensions and centimeters or millimeters for the tile. The calculator converts all measurements consistently and reports square-meter results.
Calculate Bathroom Tile, Boxes and Cost
Enter the floor, walls, shower, tub, tile size and carton coverage to build a practical bathroom material and installation estimate.